Stock 5.7 rods in a 400 should hit the cam and block. Also the 400 crank will required lots of work to fit the 5.7 rods (cutting and balancing).
You can buy "stroker 5.7 rods" which are already clearanced.
Since you are building a street engine, consider using stock 400 rods. Avoids lots of pit falls and cost.
No need for a split duration cam with afr heads. Intake and exhaust duration should be the same with those heads. If you don't use headers or have a restrictive exhaust system then the extra exhaust duration will be good.
I would use a cam with 230 degrees duration at 0.050" on both the intake and exhaust, 110 LSA, headers, dual 2-1/2 or 3", and setup the engine with 10:1 cr. Should make close to 500 hp with any rod.